Can rigid bodies interact with fluid domain?
Fluid simulations and rigid body simulations cannot interact.

Fluid simulations can react to rigid bodies, if the rigid body is a fluid obstacle. Set your falling objects both as fluid obstacles and rigid body active objects. A key setting is to check "Export Animated Mesh" in the fluid settings of the active rigid body object. This 2.68 tutorial should work fine in the newest 2.78.

The rigid body can be simulated beforehand or during playback and will not be affected by the fluid (the fluid can't push an active rigid body around).

However, in your case I wouldn't use this, because:


The motion of falling raindrops is very simple, it can be easily done with keyframes
As Duane Dibbley commented, the whole ripple-effect could be easier with dynamic paint
Rain is not a rigid body... If you wanted maximal physical accuracy, the rain drops should be fluids as well. 
Particle systems are also not rigid bodies, it can be tricky to combine the two.